1. what is the oldest part of a clam's shell called and how can it be located?

The umbo is the oldest part of the clam and it is the coiled up hump like structure with the tight rings.

Explanation:

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.

d) center of the mid-ocean ridge

give brainleysest

sinserly,

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